MC68HC11PH8 Datasheet, PDF (79/264 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

4
PARALLEL INPUT/OUTPUT
4
The MC68HC11PH8 has up to 54 input/output lines and 8 input-only lines, depending on the
operating mode. To enhance the I/O functions, the data bus of this microcontroller is
non-multiplexed. The following table is a summary of the configuration and features of each port.
Table 4-1 Port configuration
Port
Input
pins
A
Ñ
B
Ñ
C
Ñ
D
Ñ
E
8
F
Ñ
G
Ñ
H
Ñ
Output
pins
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Bidirectional
pins
Alternate functions
8
Timer
8
High order address and LCD segment drivers
8
Data bus
6
SPI1 and SCI1
Ñ
A/D converter
8
Low order address
8
R/W on PG7, LCDBP on PG6, SPI2 and SCI2 (with MI bus)
8
PWM and modulus timer clock inputs, keyboard interrupt
Note:
Do not confuse pin function with the electrical state of that pin at reset. All
general-purpose I/O pins that are configured as inputs at reset are in a high-impedance
state and the contents of the port data registers are undefined; in port descriptions, a
‘u’ indicates this condition. The pin function is mode dependent.
MC68HC11PH8
PARALLEL INPUT/OUTPUT
TPG
MOTOROLA
4-1